14
thick(adjective, slow, stupid)
13
fatuous(adjective, silly, stupid, impractical, unintelligent)
11
blockheaded(adjective, simple, slow, stupid, impulsive)
11
thickheaded(adjective, simple, slow, stupid)
9
stupid(adjective, simple, slow, silly, unintelligent)
7
doltish(adjective, simple, slow, stupid)
7
obtuse(adjective, simple, slow, stupid)
6
dim-witted(adjective, slow, stupid)
6
dull
6
fatheaded
6
loggerheaded
6
slow-witted(adjective, slow, stupid)
5
dense(adjective, simple, silly, stupid, unintelligent)
5
dumb(adjective, simple, slow, stupid, impulsive)
5
feeble-minded(adjective, impulsive, impractical, half-baked, doomed)
5
moronic(adjective, slow, silly, stupid, impulsive)
5
thick-skulled
4
dopey(adjective, slow, stupid)
4
empty-headed
4
foolish(silly, impulsive, impractical, unintelligent, unaware)
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APASmart Define. (2015). boneheaded thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/boneheaded/thesaurus/synonyms
ChicagoSmart Define. 2015. "boneheaded thesaurus" https://smartdefine.org/boneheaded/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, boneheaded thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/boneheaded/thesaurus/synonyms>.
MLASmart Define. "boneheaded thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/boneheaded/thesaurus/synonyms>